I love Ruby and Rails, but Mr. Harton has an opinion and that's fine. These issue aren't new, but I would point to Eileen Uchitelle's talk on the future of Rails, and as mentioned above progress continues to be made on Ruby itself. So I think it's fair to say that the respective core teams are not resting on their laurels. And as Mr. Cain pointed out, speed isn't everything. There's value in having such a large and vibrant community for instance.
Having said all that, it's perfectly reasonable for someone to eventually outgrow their tools. I can only speak for myself, but I'm not there yet. Ruby and Rails still have a lot to offer me.
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